The ultimate guide to hiring a web developer in 2021
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.
Here's some projects that our expert JSON Developers made real:
Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.
132,881 értékelés alapján az ügyfelek 4.9 / 5 csillagot adtak JSON Developers szabadúszónknak.JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.
Here's some projects that our expert JSON Developers made real:
Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.
132,881 értékelés alapján az ügyfelek 4.9 / 5 csillagot adtak JSON Developers szabadúszónknak.Project Description: I need a freelancer to deliver a fully verified and operational Meta Business account that is ready to use the Meta Graph API for WhatsApp messaging. The account must support sending template-based messages via WhatsApp. Requirements: Meta Business account already verified (no pending reviews or restrictions). WhatsApp Business API configured and active. Ability to send messages using message templates approved by Meta. Full admin access to the Meta Business account (login email and password). API credentials (permanent access token, phone number ID, business ID). Account must be owned and transferable to me — I will change the email/password upon delivery. Deliverables: Meta Business login credentials (email + password). WhatsApp Business API access to...
I’m working with voice AI agents (using Retell AI), and I want them to be able to book appointments directly into Google Calendar. The idea is pretty simple in my head: I want to create a small set of functions (like a toolbox) that the AI can call depending on what the user says. For example, if someone says “I want to book an appointment,” the agent should just call something like "create_event" and that handles everything in Google Calendar. So basically, I need you to build that layer in between — something clean and reusable. A few important things: First, I’d like around 6–10basic functions: create_event, check_availability, list_events, update_event, delete_event… that kind of stuff. Second, these functions need to be super ...
**Project Overview** We already have mature Routeblock tables with 20k+ cached flight and hotel routes. We need a professional, production-ready, independent Laravel 13 microservice called **FlightAPI** that: - Completely replaces Amadeus for both Flight and Hotel dummy itinerary generation - Produces realistic dummy PDFs that exactly match our current samples (PDFs will be attached) - Runs on full autopilot with scheduled refresh - Exposes a clean public B2B REST API - Supports direct sales + distribution on RapidAPI, Rakuten API, and other marketplaces **Core Objective** Build a reliable 3-layer hybrid engine for Flight + Hotel that delivers 95%+ realism dummy documents, never fails, and becomes our scalable SaaS product with recurring revenue. **MANDATORY Architec...
ANNOTATOR JOB DESCRIPTION — Dental X-ray AI Project Title: Dental X-ray Image Annotator (Remote, Freelance) Duration: 1–2 months (extension possible) Time Commitment: Approx. 2–3 hours/day Compensation: US$ 5 Per image About the Role: We are building an AI to detect dental pulp stones and root canal complexity from dental radiographs. You’ll be annotating X-ray images using a custom GUI tool (simple point-and-click, no technical skills required after training). Responsibilities: Annotate pulp stones and canal paths on provided dental X-rays Follow exact shape, boundary, and label protocol Submit JSON or project output for each image Maintain annotation quality and consistency Collaborate via WhatsApp for feedback Requirements: Back...
I want a complete Android e-commerce application built from scratch. The core of the project is a clean, intuitive shopping experience that consumes my existing REST APIs, parses JSON responses efficiently, and presents products attractively through XML-based layouts. To succeed you’ll need to: • Hook the app to my REST endpoints for product listings, cart actions, checkout, and user accounts. • Structure all network calls responsibly, with solid error handling and graceful offline states. • Respect Android’s latest permission model when accessing camera, storage, or sensors; the app must never crash on denied permissions. • Keep UI components modular and reusable—Material Design guidelines are a must so the catalog, product detail, and checkou...
I’m building a school IT project that needs to pull basic business details from the Indian GST system. The flow is simple: a user enters a GSTIN, your PHP code hits the official government API, parses the JSON it returns, and then writes those basic details into a local MySQL table. Here’s what I’m expecting from you: • A clean, well-commented PHP script that takes a GSTIN as input, calls the API, handles errors such as invalid IDs or network time-outs, and prevents duplicate inserts. • A MySQL schema (CREATE TABLE) matching the fields the API provides for basic business details—GSTIN, legal name, trade name, registration status, address, last updated date, etc. • A short README explaining how to set up any needed keys, configure database cre...
I need my existing chat application’s REST API connected to Zapier so every new conversation, message, and customer detail can flow straight into Salesforce in real time. The chat platform already exposes webhooks for events such as “conversation started”, “message sent”, and “conversation closed”. Your job is to build a Zapier app or a series of Zaps that: • Receive those webhook payloads • Map the data to the correct Salesforce objects (lead, contact, case, or custom objects we agree on) • Push updates back to the chat API when status changes in Salesforce (e.g., case closed) The chat API is fully documented and uses standard JSON over HTTPS with token-based authentication. I have Zapier and Salesforce admin access ready fo...
I run live NFL card breaks on Whatnot and stream everything through OBS. I’m looking for a fully-customizable break board overlay that I can drop straight into OBS as a browser or media source and update on the fly during the stream. Here’s what I need the finished board to do: • Present every NFL team logo in a clear, well-spaced layout so I can mark which teams are taken or still available during the break. • Follow a colourful, playful look—bright accents, bold typography, and fun motion effects that match the energy of live card breaks. • Let me quickly edit text fields (break number, box info, hit tracker, etc.) without leaving OBS—JSON, Google Sheet sync, simple HTML fields, or another lightweight method is fine as long as updates appear ...
I need a solution that continuously pulls fresh information from two different channels and hands it back to me in a clean, structured way. The text comes from an API I already have access to, while the images should be fetched directly from social-media endpoints. Here is what matters most to me: • Real-time or near real-time collection, so new records appear in the output within minutes of going live. • A single workflow that grabs the text from the API and the images from the social platform, then stores everything together—ideally in JSON or a lightweight database. • Resilient error handling (rate-limits, retries, logging) and clear documentation so I can run or extend the script later. Python is my usual stack, but I’m open to any language you a...
I have all server-side APIs ready; what I now need is a clean, modern front end crafted entirely with Tailwind CSS. The overall aesthetic should feel contemporary and light, and the homepage must follow a grid-based layout that scales smoothly from mobile to desktop. Pages to be implemented: • Home (grid-based landing view) • About Us • Services • Technologies • Case Studies • Contact • TCPA compliance notice • Global, actionable CTA components For each page, I will supply the endpoint map and sample JSON. Your job is to design the page structure, wire the UI to the relevant fetch calls, and present the returned data in a clear, interactive way—no hard-coded placeholders once integration begins. Key points • Pure Tailwind ...
Saya membutuhkan bantuan untuk menerjemahkan materi bisnis yang mencakup dokumen, salinan website, dan string aplikasi ke dalam bahasa Indonesia. Semua teks harus dipindahkan secara akurat sekaligus mempertahankan nada profesional dan kosakata khusus dunia bisnis. Cakupan tugas: • Terjemahkan seluruh konten—dokumen, halaman web, dan antarmuka aplikasi—ke bahasa Indonesia yang alami. • Jaga setiap elemen tata letak, tag HTML, variabel, dan placeholder persis seperti aslinya agar format tidak berubah. • Pastikan terminologi bisnis konsisten di semua media. • Lakukan penyelarasan istilah jika ada modul, menu, atau CTA yang muncul di lebih dari satu tempat. Keluaran yang saya harapkan: 1. File dokumen kembali dalam format aslinya (Word, PDF, atau sejen...
We are hiring one senior Unity XR developer to build and ship a commercial standalone Meta Quest 3 / Quest 3S title for the Meta Horizon Store. This is a fixed-price, time-critical project with two connected deliverables: 1. a polished commercial Quest title 2. the reusable engine foundation it runs on, designed to support future titles in the same series We are not looking for a generic Unity freelancer. We need someone with real, verifiable Meta Horizon Store shipping experience. Required experience * At least 4 live Meta Horizon Store titles * At least 2 titles as lead or sole developer * Strong experience with: * Unity 6 LTS * OpenXR * Meta XR package set via UPM * Addressables * URP * IL2CPP ARM64 * Quest standalone optimization * Meta review / VRC...
Necesito un scraper robusto que automatice la extracción periódica de datos de una web app sofisticada construida con Ionic. El sitio está protegido por Cloudflare y reCAPTCHA invisible, así que el script debe sortear ambas capas sin intervención humana. Qué busco: • Automatizar la tarea de extracción en intervalos regulares (cron o equivalente). • Guardar los datos en JSON o insertarlos directamente en mi base de datos; podemos definir el formato final juntos. • Preferencia por Python (requests, Playwright, Selenium, cloudscraper) u otra tecnología que garantice estabilidad y bajo riesgo de bloqueo. Entregables: 1. Código fuente bien documentado. 2. Instrucciones de despliegue en Linux. 3. Tarea progra...
I’m looking for a developer who can build a stable, easy-to-maintain Discord bot with that focuses on server moderation. Core commands should let my staff quickly ban, mute, kick, and warn members while logging every action to a dedicated mod-log channel. Beyond the standard tools, the bot also needs to: • Send automated welcome messages in a customizable embed as soon as someone joins • Post regular announcements pulled from a channel or JSON file on a timed schedule • Push event reminders a set number of minutes or hours before start time For smoother moderation, I want spam detection with configurable thresholds, a clean message-filter system for links or specific words, and automatic role assignments triggered by reactions or join conditions. I’ll ...
I’m looking for a sharp front-end specialist to take our existing web application and make the user experience shine. The backend is already solid; what I need now is modern, responsive and accessible UI work that feels fast and polished across major browsers and devices. You’ll be working with our REST-based API, so comfort with JSON, Axios / fetch and state management (React + Redux or comparable) is important. Figma files and a clear component map are ready—your task is to translate those designs into production-ready code, wire them to the API, and leave the codebase clean, tested and easy to maintain. Key things I expect • Pixel-perfect implementation of the supplied designs • Reusable, well-documented components • Cross-browser and mobile resp...
I need a skilled Angular developer to craft a fully-static promotional website that highlights the rich culture of Sikkim. The site must feel unmistakably traditional and cultural in its aesthetics while remaining fast, responsive, and easy to maintain. Scope of work • Build with the latest stable Angular, using TypeScript, SCSS/ CSS, and Angular-CLI so I can run a simple `ng build` to generate production-ready static files. • Three core content areas: Cultural Events, Heritage Sites, and Artist Profiles. Each should sit on its own dedicated route with a clean URL structure and an index page that lets visitors filter or search within that section. • A visually engaging home page that acts as a gateway to those sections and immediately communicates the department&rsquo...
I’m building a fully-automated lead generation engine and need an engineer who can wire everything together end-to-end. The core flow pulls prospects from Clodo, enriches them with Clay, sequences outreach through Apollo, syncs engagement data back to HubSpot, and surfaces every scored lead in a dedicated Slack channel. All of these services expose solid REST/GraphQL APIs, so the job is primarily about clean JSON handling and resilient workflow orchestration. Key functions I want in place: • Email outreaches, data enrichment, plus lead scoring and routing run automatically on every new record. • GitHub Actions triggers and monitors the pipeline, with Python scripts responsible for transformation, enrichment and retry logic. • Each step posts concise status and error m...
I have a set of blood-test reports that arrive as PDFs, and I need an accurate, repeatable way to extract only the test result section from each file. The patient demographics and doctor’s notes can be ignored; my focus is strictly on the numerical results, reference ranges, and units. Here’s what I’m looking for: • A lightweight script or small desktop tool (.NET Core + Tesseract, AWS Textract, or any engine you prefer) that ingests multi-page PDF blood panels and returns structured data—CSV or JSON is fine. • Clear mapping of the extracted fields to their respective test names as they appear in the PDF. • Reliability across differing lab layouts; most follow similar tables, but spacing and fonts vary. Acceptance criteria 1. Feed a sample...
We need a robust yet lightweight script that can automatically pull business details from a publicly accessible government website. The information to capture will centre on business details, such as registration numbers, business name, registration date, address, etc. The workflow should: • Navigate every relevant section of the site (pagination, search filters, subsidiary pages). • Extract the required fields accurately • Export clean, structured data to CSV and JSON A Python solution leveraging requests/BeautifulSoup or Scrapy is preferred, but I’m open to other dependable stacks if they handle rate-limits, retries, and potential CAPTCHA gracefully. The script must be easy to rerun on demand, with clear instructions for environment setup and any dependencies...
Tenho um cardápio digital 100% funcional em HTML, CSS e JavaScript puro; o fluxo de pedidos via WhatsApp e o carrinho já operam corretamente. Agora preciso conectar tudo ao Firebase para que os produtos sejam carregados dinamicamente em vez de virem de um array local. O que preciso, de forma objetiva: • Configurar Firestore e Storage, criando a coleção de produtos (lanches e bebidas) exatamente no formato de objeto JSON que já defini. • Substituir o array local pela leitura desses dados no Firebase, mantendo a experiência atual intacta. • Ajustar IDs e qualquer detalhe de estrutura que garanta o funcionamento perfeito do carrinho. • Deixar o código limpo, organizado e comentado para facilitar ediçõ...
I need a lean, battery-friendly Android app that can stream a smartphone’s GPS coordinates in real time. Once the user grants permission, the app should run as a foreground service, capture accurate latitude and longitude, and post them every few seconds to the REST endpoint I will provide. A small in-app Google Maps view must mirror the live position so we can confirm everything instantly. Please follow current Android 13 location-permission rules and make sure tracking survives reboots, Doze, and other battery optimisations. I will share the API spec; you may use Retrofit, Volley, or any modern HTTP client you prefer, as long as JSON payloads stay lightweight. Deliverables • Complete Android Studio project (Kotlin or Java) with well-commented code • Signed release A...
I’m putting together a 25–30-page picture book that teaches the etiquette of cleanliness to children roughly 3-7 years old. The narrative should be driven primarily by the illustrations, with short lines of supportive text placed so the artwork stays front-and-center. Here’s the flow I have in mind: • You prepare a simple JSON file that lists every page and the visual concept for that page (character pose, key props, setting, mood, colour cues, etc.). • Using any AI image tool you prefer—Midjourney, DALL-E, Stable Diffusion—generate artwork that closely matches each concept. The goal is a cohesive, appealing style; near-replicas of the reference images I’ll share are fine as long as copyright is clear. • Lay the images and text in...
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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